As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALLED MANIFOLD WAS USED AT THIS ANNUAL INSPECTION TO FIND NR 4 CYLINDER EXHAUST STACK AFT END AT SLIP JOINT BULGED AND CRACKED. STAINS IN THAT AREA WERE NOTED, HEATSHIELD DEFLECTED LEAT FROM ANY FURTHER DAMAGE. PART NOT SOLD SEPARATELY, NEW REDESIGN LEFT EXHAUST MANIFOLD ASSEMBLY INSTALLED.